In the top of a double-boiler over hot water, melt the chocolate squares.
Stir in the sugar.
Gradually stir in hot coffee, mixing thoroughly.
Add the milk and continue cooking until all particles of the chocolate are
dissolved and the mixture is smooth, about 10 minutes.
Pour into a jar, cover and chill.
When ready to serve, stir in the chilled cola.
Serve over ice cubes in tall glasses.
For a beverage, top with whipped cream.
For a dessert, add a scoop of vanilla ice cream.

Mix juices and frozen orange juice concentrate; chill.
Add chilled club soda immediately before serving.
Serve over ice in tall glasses with straws.
Garnish each serving with a sprig of mint, and small umbrella if desired.
Yield: 2 quarts